Aircraft engine starting/generating system and method of control

A starting and generating system for use with an aircraft engine, said starting and generating system comprising:

• a starter/generator configured to start the aircraft engine in a start mode and to generate AC power in a generate mode, said starter/generator comprising an exciter and a rotational shaft;
• an inverter/converter/controller (ICC) coupled to said starter/generator, said ICC configured to provide AC power at a first frequency to said starter/generator in the start mode and to control said exciter during the generate mode such that the generate mode AC power has a second frequency, said ICC comprising a control board configured to control said ICC by determining the first frequency based on a shaft speed of said shaft and wherein the second frequency is substantially constant and less than the first frequency.